| Mythos Media Ltd | Professional & scientific | 2020 |
| N & K Edwards Limited | Professional & scientific | 2017 |
| N R Associates (SW) Limited | Construction | 2011 |
| N.R.I. Fabrics Limited | Wholesale & retail | 1994 |
| National I.T. Services Ltd | Information & communication | 2017 |
| Needzinc Limited | Households | 1984 |
| Neotectonic Limited | Information & communication | 2013 |
| NETVIEW360 Ltd | Construction | 2023 |
| New Paradigm Solutions Limited | Other services | 2003 |
| New Soul Deli Ltd | Hospitality | 2025 |
| Newmans Accounting Services Limited | Professional & scientific | 2015 |
| Newstudio Limited | Real estate | 2001 |
| Nexfleet Ltd | Transport & logistics | 2026 |
| Next Steps (Living, Dying, Grieving) CIC | Information & communication | 2020 |
| Nicholas Jones Ltd | Construction | 2008 |
| Nick Coughlin Associates Limited | Manufacturing | 2007 |
| Nick Hurst Myob Limited | Professional & scientific | 2012 |
| Nigel Dalton Ltd | Professional & scientific | 2014 |
| NJG Properties Ltd | Real estate | 2004 |
| Nobles Management Limited | Professional & scientific | 2010 |
| Normandy Cafe Ltd | Hospitality | 2025 |
| North Upton Barns (Amenities) Limited | Hospitality | 1990 |
| Norton Barns Properties Limited | Construction | 2013 |
| Nowbreathe Online Limited | Professional & scientific | 2016 |
| NWM Services Ltd | Wholesale & retail | 2025 |
| Nyumba Deals Limited | Real estate | 2024 |
| Oakfield Estates (Staffs) Limited | Real estate | 2021 |
| Ocean Court (Salcombe) Management Company Limited | Real estate | 2005 |
| Ocean Leisure Storage (1987) Ltd | Transport & logistics | 2017 |
| Ocean Sports Training Ltd | Education | 2018 |
| OCF Management Ltd | Real estate | 2015 |
| Oldroyd (Preesall) Ltd | Real estate | 2015 |
| Oliver Place Management Company Limited | Administrative & support | 1988 |
| Omnology Limited | Professional & scientific | 2014 |
| ON Water Developments Limited | Construction | 2018 |
| One Barton House (Hope Barton Barns) Limited | Hospitality | 1995 |
| Onwater Developments Projects Limited | Real estate | 2023 |
| Optishoot Limited | Wholesale & retail | 2014 |
| Orbis Africa Ltd | Administrative & support | 2022 |
| Orchard Cider Barns Limited | Administrative & support | 2018 |
| Orchard Cleaning and Laundry Limited | Administrative & support | 2017 |
| Orchidbridge Limited | Construction | 1982 |
| Orchurch Limited | Real estate | 1978 |
| OS Illustration Limited | Arts & recreation | 2025 |
| Oshacroft LLP | | 2019 |
| Ouimedia Limited | Information & communication | 2025 |
| OUT of Town Odyssey Limited | Financial services | 2025 |
| P.J. Motor Services (Kingsbridge) Limited | Real estate | 1979 |
| P.O.S.H Country Limited | Wholesale & retail | 2020 |
| Packman Trading Limited | Wholesale & retail | 2008 |
| Packtypes Ltd | Extraterritorial | 2011 |
| Paige Digital Ltd | Information & communication | 2023 |
| Paint One Limited | Construction | 2020 |
| Palladium Builders Merchants (Kingsbridge) Limited | Wholesale & retail | 1987 |
| Palladium Building Supplies Limited | Extraterritorial | 2017 |
| Pangea Impact Investments Ltd | Financial services | 2021 |
| Pantheon (UK) Limited | Manufacturing | 2003 |
| Parchberry Limited | | 1980 |
| Passive Self Publishing Limited | Information & communication | 2023 |
| Paternoster Investments Ltd | Professional & scientific | 2012 |
| Pathfinder Technologies.Com (Devon) Limited | Wholesale & retail | 2012 |
| Paul a Barlow Limited | Construction | 2001 |
| Paul a Dornom Limited | Agriculture & fishing | 2004 |
| Paul Jepson Ltd | Arts & recreation | 2012 |
| Pawsey Design Limited | Professional & scientific | 2008 |
| PCA Consulting (SW) Ltd | Professional & scientific | 2018 |
| PCA Consulting Engineers Ltd | Financial services | 2014 |
| Peanut Robson Holdings Ltd | Financial services | 2025 |
| Pelham Smithers Associates Limited | Administrative & support | 2009 |
| Penguin House Limited | Hospitality | 2023 |
| Pennycroft Consulting Ltd | Professional & scientific | 2023 |
| Perdyx Limited | Professional & scientific | 2011 |
| Perioban Limited | Health & social care | 2010 |
| Perugian Limited | Construction | 2004 |
| PEST365 Ltd | Wholesale & retail | 2025 |
| Peter Betteridge (Furnishers) Limited | Wholesale & retail | 1976 |
| Phase to Phase Consulting Limited | Administrative & support | 2016 |
| Photodrones Ltd | Professional & scientific | 2015 |
| Photonics Express Ltd | Manufacturing | 2021 |
| Piscarius | Financial services | 2016 |
| Pomegranate Pink Limited | Administrative & support | 2007 |
| Pomerory Properties Limited | Real estate | 2020 |
| Pond Farm SH Limited | Agriculture & fishing | 2026 |
| Pooja's Pantry Limited | Hospitality | 2025 |
| Porch House (Kingsbridge) Limited | Real estate | 1991 |
| Portable-Floors Ltd | Administrative & support | 2016 |
| PPS GAS Engineer and General Plumber Ltd | Construction | 2024 |
| PR Plumbing & Heating Ltd | Construction | 2011 |
| Precision Bike Covers Ltd | Wholesale & retail | 2026 |
| Predes Limited | Construction | 2022 |
| Predictive Innovation Ltd | Professional & scientific | 2007 |
| Pree Health Limited | Wholesale & retail | 2019 |
| Prime Garden Services Ltd | Administrative & support | 2022 |
| Prime Waterfront and Country House Limited | Real estate | 2023 |
| Primrose Trail Ltd | Other services | 2020 |
| Pro Rider Motorcycle Training (Newton Abbot) Limited | Administrative & support | 2005 |
| Production Projects for Primaries Community Interest Company | Arts & recreation | 2025 |
| Project Para Limited | Professional & scientific | 2026 |
| Pryderi Limited | Financial services | 2017 |
| PT Electrical (South West) Limited | Construction | 2004 |